Kashi Scientific 15mL Screw Cap Conical Centrifuge Tubes, Sterile Test Tubes with Blue Lids, Lab-Grade Polypropylene Plastic, Printed Graduation and Write-on Spot [15mL, 50]

Great value. I use these for banking frozen yeast with glycerin and they've worked perfectly. They seal nicely and don't leak, just don't overfill.

Bought these for a few different science experiments for my kids science birthday party. They are high quality, durable, and leak proof. Great value for price.

These worked great for my insect collection. They stand up that’s helpful when using liquid.

GREAT COMPANY & VALUE! I wasnt sure when I first bought some pipette tips and PCR tubes from these guys almost 2 years ago. But if they were cruddy then I could always return. But no need! The ONLY gripe is their 10uL filter tips which the filters aren't always seated properly and filling up 10uL sometimes touches the filter and ruins the sample being measured and used. But the materials are high quality and I even saw these guys have a booth at the ADLM (AACC) floor last year! I actually like their PCR tubes better than USA Scientific and others ive tried. Well done!

These are good quality and they come in a sealed bag which keeps them sterile. I purchased them to be used as slants for mycology work but they were too small to work with.

I use these centrifuge tubes to collect biological sample with. The caps and tubes are good quality. They work well for both liquid and solid collection vessels. They are affordable and for my purposes, they are exactly what i need. I will buy more.

it's what I wanted for cleaning my fountain pen nibs.

Basic useful product. Does what it was intended to do. Would purchase again.

Atendeu ao meu propósito que era acondicionar grãos de café no freezer. Gostaria que o plástico fosse mais robusto.